The .50 BMG reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

.50 BMG

.50 BMG aka .50 Browning Machine Gun is a caliber invented for the M2 machine gun that is now also used in high powered sniper rifles. Its metric dimensions (and designation) are 12.7x99mm NATO.

A wide variety of ammunition is available including ball, tracer, armor piercing, incendiary and saboted sub-caliber rounds.

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